Drill-head



J. F. BUHR.

DRILL HEAD.

APPLICATION FILED mm1, 1919.

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J. F. BUHR.

'DRILL HEAD. APPLICATION FILED JAN.I1, |919.

,$94,709. Patented Oct. 25- 1921.

5 SHEETS-SHEET 2.

J. F. BUHR.

DRILL HEAD.

APPLICATION FILED IAN. II, I9I9.

Patentedv oet. 25, 1921.

SHEET 3.

5 SHEETS '1. F. BUHR.

DRILL HEAD. APPucATioN FILED mm1, |919.

Patented Oct. 25, 1921.

5 SHEETS-SHEET 4.

Patented 00L 25, 1921,

5 SHEETS-SHEET 5.

' 1. F. BUHR.

DRILL HEAD.

APPLICATION FILED IAN. Il. 1919. 1,394,709.

Para

JOSEPH' F. BUHR, OF DETROIT, MICHIGAN.

DRILL-HEAD.

Application led January 11, 1919.

Y 10 (/ZZ yl1/tom it may concer-7i:

Be it known that l, JosnPH F. BUHR, a citizen of the United States of America, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Drill- Heads, of which the following is a specification, reference being had therein to the accompanying drawings.

The primary object of my invention is to provide a multiple drill head for drilling machines by which a plurality of drills'may be operated in synchronism to drill, bore or otherwise operate on one or more pieces of work, and perform operations anywhere in a circle of prescribed radius. v Another object of my invention is to provide a drill head of the above type with adjustable drill sockets that may be swung about and shifted to and from fixed driving points, and novel means isl employed, as hereinafter set forth, for transmitting power from a central source of power to the fixed driving points and from there to the drill sockets. d v

A further object of my invention is to provide a drill head embodying a detachable aoV and rotary transmission housing with which is associated a drill socket and radius member, both of which may be shifted relative to the transmission housing and xed thereby relative to the drill head.

The above and other objects are attained by a mechanical V constructionthat will be hereinafter considered in connection with the drawings, wherein- Figure 1 is a side elevation of the multiple drill head, partly broken away, Aand partly in Section;

Fig. 2 is a plan of the same, partly broken away, and partly in section;

Fig. 3 is an elevation of a detached suspension bolt; 4 Y

Fig. Liis anv enlarged vertical sectional view of a portion of the drill head, showing one of the drill units thereof;

Fig. is va perspective view of a detached and' rotary transmission housing;

Fig. 6 is a similar view of adetached radius member;

Fig. 7 is a vertical sectional View of a modified form of -drill socket Fig. 8 is a side elevation of a portion of the drill socket; 1

)Figl 9 an elevation ofi); Edrill unit, partly Specification of Letters Patent.

Patented Oct. 25, 1921.

Serial No. 270,646.

broken away and partly in section, showing a modified form of transmission mechanism;

F ig. 10 is a vertical cross sectional View ta (en on the line f-X of Fig. 9;

Fig. 11 is a plan of the drill unit shown in Fig. 9;

Fig. 12 is a similar view of the drill unit. showing the drill socket partly broken away .and partly in section, and

Fig. 13 is a vertical cross sectional view taken on the line XIII-XIII of Fig. 12.

Reference will fii'st be had to Figs. 1 to 3 inclusive showing the preferred form of construction and wherein the reference numeral 1 denotes a head, which for the present number of' drills may be conveniently made rectangular in plan, said head having a central opening 2 with a flange or collar 3 surrounding said opening and providing arseat for an anti-frictional thrust bearing 11'. The collar 3 also constitutes a guide or bearing for the lower end of an adapter or sleeve member 5, which is stationary and has been disclosed in my Patent No. 1,237,017 'dated Aug. 14C, 1917, said sleeve member be.. ing capable of vertical adjustment and through which power is transmitted by a driven spindle member 5a to various drills supported fromthe head .1. The adjustable sleeve member 5 forms no part of the present invention other than a support for the head 1, said sleeve. member having a peiipheral flange 6 engaged by a clamping member 7 on top of the head 1, said clamping member permitting of the head being rotated relative to the sleeve member and also fixed in a desired position.

In the sleeve member 5 and supported by the thrust bearing t is a drive spindle 8 which has its upper end fixed in the driven spindle member 5a and its'lower end forming a shank or tang 9 extending through the opening 2 into'the head 1. Mounted on the tang 9 is a horizontally disposed gear wheel 10 having its hub portions surrounded by anti-frictional bearings 12 and 13, the former being mounted in a depending flange 11 of the head 1, and the latter on a seat 14 in a closure plate 15 suitably connected, as at 16,

to the head 1. The closure plate 15 coperates Ywith the head in providing an inclosure `for powertransmitting or reduction speed gear mechanism, including the gear wheel 13 which meshes with a multiplicity of hori- AVzontally disposed `gear .Wheels 16'QL supported by anti-frictional. bearings 17 on studs 18 mounted in the head 1 and the closure plate 15. The gear wheels 16'EL mesh with similarly disposed gear wheels 19 having hnb portions 20 thereof mounted in anti-frictional bearings 21 and 22 seated in the head 1 and the plate 15 respectively. The gear wheels 19 are preferably located in the corners or angles of the side walls of the head 1. as best shown in Fig. 2, and the mechanism just described constitutes means for transmitting power from the drive spindle 8 to the outer portions of the mechanism located within the head 1. The work performed by the gear wheels 19 and the mechanism operated thereby are identical, se l deem it only necessary to describe one of the drill units associated with the head 1 and operated by Vone of the gear wheels 19.

Reference will now be had to Figs. 8, 4 and 5 showing one of the drill units as held in operative relation beneath the plate 15 by a suspension bolt 28, said bolt having the lower end thereof provided with a cylindrical stepped head 24 and a yoke 25, while the upper end of the bolt is threaded to receive a nut 26 by which the bolt is held in engagement with the head 1. The bolt.extends through the hub portions 20 of the gear wheel 19 and through the hub portion 27 of a beveled gear wheel 28, the hub portion 27 being elongated and provided with a squared portion 29 for thegear wheel 19, whereby the latter may revolve the bevel gear w eel 28. This gear wheel, as well as the lower part of the bolt 28, are located in a transmission housing 30 having its lower end supported and closed by the head 24 of a bolt 23. The upper end of the housing 30 has a collar 31 rotatable in the plate 15 and the upper end of said housing also has flat parallel faces 32 forming a shank or guide 83 on the upper end of the transmission housing for a radius member 34 which is slotted as at 85, to receive the upper end of the transmission housing, as shown in Fig. 5. With the suspension bolt 23 loose it is possible to rotate the transmission housing 30 about the bolt 28 as an axis and to shift the radius member 34 on the upper end of the transmission housing, said radius member and the transmission housingbeing` fixed in an adjust-ed position relative to the plate 15 by tighteningA theV nut 26 on the suspension bolt'23. This is'brought about by thehead 24 of said bolt forcing the transmissionA housing 30 upwardly against the radius member 84 and said radius member against the lower face of the plate 15. i

One side of the transmission housing 30 has a cylindrical extension 34u containing an' anti-,frictional bearing 35 retained in the extension by an apertured screw-cap 36. The bearing 85 supports the hub portion 37 of a beveled gear'wheel 38 that meshes with,l the gear wheel 28 and in said beveled gear wheel 88 is a key or spline 39 extending into a longitudinal key way or groove 394 in ay horizontally disposed shaft 41, said shaft extending through the operture in the` cap 86, the yoke 25 of the bolt 23, and through an opening 40 in that wall of the transmission housing 30 opposite the cylindrical extension 34a.

One end of the radius member 34 has a depending collar 42, communicating with an opening 43 in the end of said radius member. urrounding the collar 42 and lconnected to the radius member 34 by screii's 44 or other fastening means is the upper end of a socket member 45. ln the collar 42 is an anti-frictional bearing 46 for the upper stepped end 47 of drill socket 48, said drill socket having its upper end provided with a nut 49 or other retaining means within the opening` 48 of the radius member 34.

The lower end of the drill. socket 48 has a peripheral flange 50 between anti-trictional bearings 51 and 52l in thelower end of the socket member 45, the bearing 52 being retained in the socketimember by a screw cap or plug 53 and the bearing 51 serving as a thrust bearing for the drill socket 48, which is adapted to receive a conventional form ofdrill (not shown).

Keyed or otherwise fixed, as at 54, on the upper end 47 of the drill socket 48, is a bevel gear wheel 55 meshing with a similar gear wheel 56 fixed on the end of the shaft 41, this end of the shaft extending into a side extension 57 ofthe socket member 45 and supported therein by an antifrictional bearing 58 retained in the extension 57 by an apertured screw-cap 59.

From the above construction it is now apparent that irrespective of the position of the socket member45 relative to the transmission housingEO that power can be transmitted from-the gear wheel '19 4to the drill socket48, 'and that said drill socket can be placed in any position within a circle having for its radius the member 34, one position, with thel sockety member 45/ini proximity to theaXis. of the head 11 has been shown at the left hand side-of'Fig. l. and another position with the socket member 45 outside the areaof the head 1 has been shown at the righthand side of Fig.

llO

`of the drilling machine permits of the multiplicity of drills being raised and lowered relative to a piece of work, and in this modification a construction is shown which permits of one-.drill being vertically adjust- Y ed independent of the others, which may be necessary oncertain pieces of work. rlhe radius member 34'has anti-frictional bearings 60 for .the upper end of a drill socket 61 located within a socket member `62A which has been shown'as integral with the end ofV theradius member. Y' The drill socket 61 is slidable inthe bearings 60 and said bearings ,movement to the drill vsocket A61 is a bevel gear wheel 65 meshing with a similar wheel 66 carriedby the end ofthe shaft 41, which is supported by thesocket member 62 somewhat similar to the supporting means shown in'Fig. 4 of the preferred form of construction.

The lower .end ofV `the .socket inember 62 has a slotted hanger 67 and adjustably connected thereto by screw bolts 68 is an auxiliary socket member 69- that receives and supports the lower end of the drill socket 61 somewhat similar to that shown in the preferred form of construction. By raising and lowering the auxiliary socket member 69 relative to the main socket member 62 it is possible to raise and lower a drill in the drill socket 61, as this drill socket is slidable in the main socket member 62 and has a rotary movement imparted thereto from the shaft 41 irrespective of its position in vthe main socket member 62.

In some instances it may be preferable to substitute worms and worm gears for some of the bevel gears, particularly in the transmission housing, and this has been illustrated in Figs. 9 to 13 inclusive. To use worm and worm gears it is necessary that" radius members 70 be offset relative to thc axes ofthe gear wheels 19 and for this pur- `pose transmission housings 71 are employed,

in offset portions 77 of the housings 71, the

shafts 76 being similar to the shafts 41 pre viously mentioned.` The off set portions 77 Aof the housings 71 have clamping portions v78 for the radius members 70, and as in the preferred formV of construction, the radius members 70 and the housings 71 may be fixed in an adjusted position relative to the closure plate 15 of the head 1.

As shown in Figs.` 11 to 13 inclusive, a

lrection of rotation of the drill sockets.

worm 79 and a worm engaging gear S0 have been substituted for the beveled gear wheels 56, 65 and 66 by simply constructing the upper ends of the socket members to receive such power transmitting elements, it being understood that suitable anti-frictional bearings are used where necessary.

From the foregoing it will be observed that a greater number of drills can be operated than that disclosed herein, as it is only necessary to make the head a little larger and place other gears in mesh with the gear wheel 16a and have these additional gears operate drill sockets. As a matter of fact additional gears, particularly idlers, can be installed in the head to obtain a desiredrdihis leads to the fact that when the socket members 40 are swung from within the area of the drill head to a position voutside thereof that the' direction of'rotatio'n of the drill is reversed, although as previously Y stated. idlers maybe installed in theV drill head to obtain a desired direction of rotation. It is also possible as disclosed in my prior patent to have a drill operated Vin alinement with the spindleS. A

It is thought that the utility of my improvements will be apparent without fur- Vhousings adapted to transmit power through said head and housings for operating said drill sockets.

2. The combination of a drill head, rotatable housings carried thereby and provided with guides, radius members slidable on the guides of said housings, drill sockets carried by said radius members, and means includingshafts slidable in said housings adapted to transmit power through said head and housings to said drill sockets.

8. The combination of a drill head, ad- `instable housings against the lower face thereof, adjustable radius members on said housings, means carried by said head adapted for simultaneously fixing said radius members-and said housings relative thereto, and drill sockets supported from said radius members and operatable from said housings..

4. The -combinationV of a drill head, a drive spindle extending into said head, gear wheels in said head operated from said drive spindle, housings below said drill head and supported thereby. drill sockets supported below said drill head` and movable to and from said housings, shafts extending through said housings and adapted for imparting movement to said drill sockets, and

lmeans in said housings and extending into said drill head adapted for transmitting power from said gearsto said shafts. Y

5. The combination of a drill head, Vadjustable housings supported at the lower face of said drillhead, adjustable radius members supportedby said housings, drill sockets supported from said radius members, shafts slidable in said housings adapted for imparting movement to said drill sockets, and means extending from said drill head into said housings and adapted for imparting movement to said shafts.

6. The combination of a drill head, a housing supported below said drill head, a

radius member' between said housing and said drill head, means axially of said housing adapted for iixing said housing and said radius member relative t said drill head, a drill socket voperatively supported by said radius member, and means adapted to transmit power to said socket from said head.

7. The combination of a drill headj` adjustable housings suspended from said head and adapted to be fixed relative thereto, radius members vslidable on said housing and adapted to be clampedV against said housings and said kdrill head, socket members carried by said radius members, drill sockets in said socket members and means adapted for transmitting power from said drill head through said housings to sai-d drill sockets.

8. The combination of a drill head,`radius members carried thereby, socket members carried by said radius members, drill sockets supportedfrom said .socket members, means carried by said socket members adapted for vertically adjusting said drill sockets, and means extending parallel to said radius members into said socket members adapted to impart movement to said drill sockets' at any adjusted position.V

In testimony whereof I affix my signature in the presence of'two witnesses.

Y v-Josiirii F. BUHR.

lVitnesses:

KARL H. BUTLER, ANNA M. Domi. 

